WO2001039182A1 - Cleaning disc, magneto-optical disc apparatus and recording/reproducing apparatus - Google Patents
Cleaning disc, magneto-optical disc apparatus and recording/reproducing apparatus Download PDFInfo
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- WO2001039182A1 WO2001039182A1 PCT/JP2000/008190 JP0008190W WO0139182A1 WO 2001039182 A1 WO2001039182 A1 WO 2001039182A1 JP 0008190 W JP0008190 W JP 0008190W WO 0139182 A1 WO0139182 A1 WO 0139182A1
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- WIPO (PCT)
- Prior art keywords
- cleaning
- disk
- magnetic head
- magneto
- optical
- Prior art date
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/121—Protecting the head, e.g. against dust or impact with the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10595—Control of operating function
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/41—Cleaning of heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10532—Heads
Definitions
- the present invention relates to a cleaning disk and a magneto-optical disk device for removing dust, dirt and other foreign matter adhering to a magnetic head and an optical head in an information recording / reproducing apparatus.
- the present invention provides a floppy disk drive (hereinafter referred to as a floppy disk drive) having a contact sliding type magnetic head and applying a modulation magnetic field to a recording medium by the magnetic head.
- a floppy disk drive hereinafter referred to as a floppy disk drive
- the present invention relates to a recording / reproducing device such as an FDD, a minidisk device (hereinafter abbreviated as an MD device), a magneto-optical data file device, and the like.
- a recording / reproducing device such as an FDD, a minidisk device (hereinafter abbreviated as an MD device), a magneto-optical data file device, and the like.
- MD device minidisk device
- magneto-optical data file device magneto-optical data file device
- Typical optical disk devices are CD_R and DVD, which use a thermal change method in which the crystal of the recording layer of the optical disk undergoes a phase change by the heat of the laser light from the optical head to perform recording.
- optical disc devices and magneto-optical magneto-optical disc devices, such as MDs which perform recording by coordinating heat generated by laser light from an optical head and a modulated magnetic field generated by a magnetic head.
- a magneto-optical disk device has a disk rotation mechanism (spindle motor).
- An optical head that emits a light beam for irradiating the magneto-optical recording layer is arranged on one side of the magneto-optical disc rotated by (), and the external magnetic field
- the magnetic head to which the magnetic field is applied is arranged so as to face the optical head.
- FIG. 20 is an exploded perspective view of a conventional cleaning disk.
- a conventional cleaning disk 100 is for an MD device, and like a general writable mini disk, a magneto-optical disk 104 having a clamp hub 19 at the center.
- An upright brush bristle-shaped lens cleaning member 27 is arranged on the surface of the magnetic head, and the magnetic head is facing the magnetic head.
- a substantially sheet-shaped head cleaning member 22 is attached to the surface to be in contact with the tip of the magnetic head at the recording position over a predetermined radius range.
- the magneto-optical disc device determines that the disc is a recording disc by a disc detection switch, and Perform the recording operation.
- the lens cleaning member 27 comes into contact with the objective lens of the optical head, and the opposite head cleaning member comes into contact with the magnetic head, and Clean the objective lens and magnetic head as the disk 104 rotates.
- perform a stop operation and remove it from the magneto-optical disk device to complete cleaning.
- the head cleaning member may be worn or the magnetic head sliding removed by the head cleaning member. Dust on the surface may adhere to the sliding surface at the tip of the magnetic head again.
- a magneto-optical disk (normal recording / reproducing disk) used for normal recording has a lubricating film of about 10 to 20 micron formed on the magneto-optical recording layer.
- the spacing between the magnetic core of the magnetic head and the magneto-optical recording layer is about 0.01 to 0.1 mm.
- the magnetic head cleaning disk has a head cleaning member having a thickness of 0.2 mm to 0.4 mm on the magneto-optical recording film. Therefore, the spacing between the magnetic core and the magneto-optical recording film is more than twice that of a normal magneto-optical disc.
- the modulation current applied to the magnetic head is changed to a value that can be used without discriminating between a normal recording magneto-optical disc and a cleaning disc.
- Set a large value so that recording on a leaning disk can be performed without any problem.
- the magnetic current is applied at the same current value as when recording on a cleaning disk.
- the frequency of use of the cleaning disk which has a large spacing between the magnetic head and the magneto-optical recording layer, is smaller than that of a normal magneto-optical disk. It is necessary to guarantee the recording on the cleaning disk, though it is smaller than that of the original. Therefore, the modulation current of the magnetic head, that is, the driving current of the magnetic head is reduced. There was a problem that it was difficult to reduce power consumption.
- a notch is provided in a part of the cartridge as disclosed in, for example, Japanese Patent Application Laid-Open No. 5-135541. It has been proposed to provide a type indicator to identify the type of disk.
- a recording / reproducing apparatus As a recording / reproducing apparatus provided with a magnetic head, there is a magnetic recording / reproducing method of recording / reproducing information on / from a disk medium using a magnetic head, as represented by an FDD. There is also a magneto-optical recording / reproducing apparatus, represented by MD, in which a magnetic head and an optical head cooperate to record / reproduce information on / from a disk medium.
- a magnetic head and an optical head cooperate to record / reproduce information on / from a disk medium.
- a recording / reproducing apparatus illuminates a magneto-optical recording layer on one side of a magneto-optical disc rotated by a disc rotating mechanism (spindle motor).
- An optical head for emitting an emitted light beam is arranged, and a magnetic head for applying an external magnetic field to the magneto-optical recording layer is arranged on the other surface so as to face the optical head. ing.
- the recording / reproducing apparatus applies a modulated magnetic field in which the direction of the magnetic field is modulated in accordance with an information signal to be recorded from a magnetic head to a magneto-optical recording layer of a rotating magneto-optical disc.
- the light beam emitted from the optical head is focused and irradiated.
- This light beam irradiation causes the portion that has been heated above the temperature of the coil to lose its coercive force to be magnetized according to the direction of the magnetic field applied from the magnetic head, and then the magneto-optical disk rotates. Due to the relative movement of the light beam, the temperature drops below the Curie temperature, and the information signal is recorded by fixing the direction of this magnetization.
- Magneto-optical discs may rotate and cause run-out.
- contact sliding is used to record information signals while the head of the magnetic head is in sliding contact.
- a recording / reproducing device having a magnetic head device of a type is used.
- the cleaning layer will be worn or cleaned.
- dust on the magnetic head sliding surface removed by the cleaning layer may adhere to the magnetic head sliding surface again.
- the normal recording operation is performed during cleaning, and the part recorded at the end of cleaning, that is, the part used for cleaning is recorded as the first song. Therefore, when using the cleaning disk next, cleaning of the magnetic head is started from the position of the second music, and thereby the same portion of the cleaning layer is magnetically cleaned. The sliding of the wire is prevented.
- a magneto-optical disk (normal recording / reproducing disk) used for normal recording has a lubricating film of about 10 to 20 m formed on the magneto-optical recording layer.
- the spacing (interval) between the magnetic core of the magnetic head and the magneto-optical recording layer is about 0.1 mm to 0.1 mm.
- the cleaning disk of the present invention includes a magneto-optical disk having an information surface and a head cleaning member for cleaning a magnetic head of a magneto-optical disk device.
- the information surface of the magneto-optical disk contains information on the cleaning conditions of the magnetic head for defining the operating conditions of the magneto-optical disk device when cleaning the magnetic head. Recorded in advance.
- the above cleaning conditions include, for example, recording conditions during cleaning of the magnetic head, specifically, the drive current (modulation current) of the magnetic head during cleaning, and cleaning.
- the rotation speed of the magneto-optical disk at the time or the laser power of the optical head at the time of cleaning can be considered.
- the above cleaning conditions are recorded, for example, in a catalog area on the information surface of the magneto-optical disc.
- information on the cleaning conditions of the magnetic head when using the cleaning disk such as the driving current (modulation current) of the magnetic head during cleaning, the light intensity during cleaning,
- the appropriate value of the rotation speed of the magnetic disk or the laser power of the optical head at the time of cleaning can be read from the cleaning disk by the optical head.
- the operating condition of the magneto-optical disc device at the time of cleaning can be set to an appropriate state in accordance with the cleaning disc.
- information on cleaning conditions can be read without providing a special structure, and the structure of the magneto-optical disc device is not complicated.
- by reading information on cleaning conditions with an optical head it is possible to identify whether the disk is a cleaning disk or a normal magneto-optical disk without any special configuration.
- the structure of the magneto-optical disk device for disc identification is not complicated.
- the magneto-optical disc device of the present invention has a magnetic head and an optical head.
- the magneto-optical disc is provided with a head cleaning member for cleaning the magnetic head and a magneto-optical disc.
- the information on the cleaning condition is read from the cleaning disk in which the information on the cleaning condition of the magnetic head is recorded on the information surface of the disk, and the cleaning is performed based on the information on the cleaning condition.
- the operating conditions during recording (recording and playback conditions) are controlled.
- information on the cleaning conditions of the magnetic head when using the cleaning disk for example, the drive current (modulation current) of the magnetic head during cleaning
- An appropriate value of the rotation speed of the magneto-optical disc at the time of cleaning or the laser power of the optical head at the time of cleaning can be read by the optical disc from the cleaning disk.
- the operating condition of the magneto-optical disc device at the time of cleaning can be set to an appropriate state in accordance with the cleaning disc.
- information on cleaning conditions can be read without providing a special structure, and the structure of the magneto-optical disc device is not complicated.
- the magneto-optical disk device for disc identification is not complicated. Even if the specifications of the cleaning disk are changed, if the operating conditions are set in accordance with the read cleaning conditions, the operating conditions of the magneto-optical disk device at the time of cleaning are adjusted to the cleaning disk. It can always be set to an appropriate state.
- a first example of the above cleaning conditions is a magnetic head drive current at the time of cleaning, and an example of operating conditions is a magnetic head driving current. There is a corresponding magnetic head drive current, and the magnetic head drive current is increased during cleaning compared to normal recording.
- the drive current (modulation current) supplied to the magnetic head is made smaller than when recording on a cleaning disc.
- the power consumption of the magneto-optical disc device it is possible to reduce the power consumption of the magneto-optical disc device and reduce electromagnetic noise.
- a second example of the above-mentioned cleaning conditions is the number of rotations of the magneto-optical disk at the time of cleaning, and an example of the operating conditions is a condition corresponding to the cleaning conditions.
- a third example of the above-mentioned cleaning conditions is the laser power of the optical head at the time of cleaning, and an example of the operating conditions is an optical head corresponding to the cleaning conditions.
- the laser power of the head is reduced, and during cleaning, the laser power of the optical head is reduced compared to normal recording.
- the laser head power of the optical head is used as the reproduction laser power during cleaning, and the magnetic head is slid in contact with the cleaning disk.
- the cleaning may be performed, and the information indicating the area of the cleaning disk used during the cleaning may be recorded in the catalog area on the information surface of the cleaning disk.
- the disk initialization may be prohibited during cleaning.
- the information on the remaining usable area of the cleaning disk and the information on the number of times of use can be prevented from being accidentally erased or changed.
- the modulation current to be supplied to the magnetic head is increased by increasing the modulating current when using a normal recording / reproducing disk.
- the modulation current to be supplied to the magnetic head is increased by increasing the modulating current when using a normal recording / reproducing disk.
- the second recording / reproducing apparatus of the present invention includes a magnetic head, and cleans a sliding surface in contact with the magnetic head in addition to a normal recording / reproducing disk as a disk medium.
- a magnetic head cleaning disk having a layer can be used, a discriminating means for discriminating that the disc medium is a magnetic head cleaning disc, and a disc medium being magnetically discriminated based on the discrimination result of the discriminating means.
- Disk medium driving means for reducing the rotation speed of the disk medium when the disk medium is a disk cleaning disk to be lower than the rotation speed of the disk medium when the disk medium is a normal recording / reproducing disk.
- a third recording / reproducing apparatus of the present invention includes a magnetic head, and a cleaning layer is provided on a sliding surface in contact with the magnetic head in addition to a normal recording / reproducing disk as a disk medium.
- a magnetic head cleaning disk having a magnetic head can be used.
- the discrimination means for discriminating that the disc medium is a magnetic head cleaning disc, and the disc medium is magnetically determined based on the discrimination result of the discrimination means. Increase the current supplied to the magnetic head when the disc is a cleaning disk, compared to the current supplied to the magnetic head when the disc medium is a normal recording / reproducing disc.
- the disc medium is a magnetic head cleaning disc based on the discrimination results of the magnetic head drive means and the discriminating means, the rotational speed of the disc medium is used, and the disc medium is used for normal recording and reproduction.
- the discriminating means detects the disc by detecting, for example, the reflectance or the color of the sliding surface in contact with the magnetic head of the disc medium. It is determined that the medium is a magnetic head cleaning disk.
- the discriminating means detects the sliding load when the magnetic head makes sliding contact with the disk medium. It is determined that the disk medium is a magnetic head cleaning disk.
- FIG. 1 is a cross-sectional view of a principal part showing a cleaning state of a cleaning disk and a magneto-optical disk device according to a first embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the cleaning disk according to the first embodiment of the present invention.
- FIG. 3 is an exploded perspective view of the cleaning disk and the magneto-optical disk device according to the first embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a main part of the magneto-optical disc for recording according to the first embodiment of the present invention.
- FIG. 5 is an explanatory diagram of a recording operation on a cleaning disk according to the first embodiment of this invention.
- FIG. 6 is a sectional view of a principal part showing a cleaning state of the cleaning disk and the magneto-optical disk device according to the second embodiment of the present invention.
- FIG. 7 is an exploded perspective view of a cleaning disk and a magneto-optical disk device according to the second embodiment of the present invention.
- FIG. 8 is a sectional view of a principal part showing a cleaning state of the cleaning disk and the magneto-optical disk device according to the third embodiment of the present invention.
- FIG. 9 is an essential part cross-sectional view showing a cleaning state of a cleaning disk and a magneto-optical disk device according to the fourth embodiment of the present invention.
- FIG. 10 is an exploded perspective view of a cleaning disk according to the fourth embodiment of the present invention.
- FIG. 11 is a flowchart showing the cleaning operation of the cleaning disk and the magneto-optical disk device according to the fifth embodiment of the present invention.
- FIG. 12 is an exploded perspective view showing a recording / reproducing apparatus according to a sixth embodiment of the present invention.
- FIG. 13 is a cross-sectional side view of a main part showing a magnetic head and a magneto-optical disk during a recording operation of the recording / reproducing apparatus according to the sixth embodiment of the present invention.
- FIG. 14 is a side cross-sectional view of a main part showing a magnetic head and a magnetic head cleaning disk during a magnetic head cleaning operation of the recording / reproducing apparatus according to the sixth embodiment of the present invention. is there.
- FIG. 15 is an enlarged view of a main part showing a sliding surface of a magnetic head in a recording / reproducing apparatus according to a sixth embodiment of the present invention.
- FIG. 16 is an explanatory diagram of a recording operation on a magnetic head cleaning disk in the recording / reproducing apparatus according to the sixth embodiment of the present invention.
- FIG. 17 is an exploded perspective view showing a recording / reproducing apparatus according to the seventh embodiment of the present invention.
- FIG. 18 is an exploded perspective view showing a recording / reproducing apparatus according to an eighth embodiment of the present invention.
- FIG. 20 is an exploded perspective view of a cleaning disk of a conventional recording / reproducing apparatus.
- FIG. 1 is a sectional view of a principal part showing a cleaning state of a cleaning disk and a magneto-optical disk device according to a first embodiment of the present invention.
- Fig. 2 is an exploded perspective view of the cleaning disk.
- FIG. 3 is an exploded perspective view of the cleaning disk and the magneto-optical disk device.
- FIG. 4 is a cross-sectional view of a main part of a magneto-optical disk for performing ordinary recording.
- FIG. 5 is an explanatory diagram of the recording operation on the head cleaning disk.
- the optical head 1 has an objective lens 2 for condensing and irradiating a laser beam onto a magneto-optical disc 4 or a cleaning disc 23.
- the objective lens 2 is driven by an objective lens driving device (not shown), for example, an electromagnetic Driven by two axes, the optical spot follows the runout and eccentricity of the magneto-optical disc 4 or the cleaning disc 23.
- the magnetic head 3 is in contact with a magneto-optical disk 4 and slides thereon to provide a modulated magnetic field.
- a magnetic head body 5 is supported at one end of the suspension 13.
- the suspension 13 is made of a thin spring material such as SUS304 or BeCu, so that even if the magneto-optical disk 4 or the cleaning disk 23 is run-out, the magnetic head is always magnetically attached.
- the disk body 5 is brought into contact with the magneto-optical disk 4 or the cleaning disk 23 to slide.
- the other end of the suspension 13 is held by the fixed part 13a, the fixed part 13a is fixed to the relay part 14a, and the relay part 14a is connected to the joint part 1 by the shaft 14b. It is rotatably held at 4. Then, the coupling portion 14 is coupled to the optical head 1.
- the transport shafts 15 a and 15 b are inserted into the optical head 1 and fixed to the base 16.
- the spindle motor 8 is fixed to the base 16.
- the turntable 7 is fixed to the tip of the rotating shaft of the spin Dormo 8.
- the turntable 7 is provided with, for example, a permanent magnet, and holds the magneto-optical disc 4 or the cleaning disc 23 by attracting a clamp hub made of metal.
- the motor drive circuit 18 rotationally drives the spindle motor 8 to rotate the magneto-optical disk 4 or the cleaning disk 23.
- the magneto-optical disk 4 or the cleaning disk 23 is stored in the force cartridge 6.
- a shutter (not shown) arranged on the cartridge 6 opens, and recording and reproduction by the optical head 1 and the magnetic head 3 are performed. Operation becomes possible.
- the disk substrate 12 is formed of a resin such as polycarbonate.
- the information layer 20 is made of a magnetic film capable of perpendicular magnetization, and is formed on the disk substrate 12 by a method such as sputtering.
- the sheet-shaped head cleaning member 22 is made of a woven or non-woven fabric made of animal fiber, plant fiber, synthetic fiber, chemical fiber, or the like.
- the head cleaning member 22 is fixed to the disk substrate 12 by, for example, an adhesive or the like.
- the thickness is about 0.2 mm to 0.4 mm.
- the coefficient of friction is about 2 to 4 times that of the lubricating film 21.
- the lens cleaning member 27 is made of nylon fiber, carbon fiber, glass fiber, amide fiber, or the like, alone or in combination.
- the lens cleaning member 17 is fixed to the disk substrate 11 by, for example, an adhesive, and the information layer 20 formed so that one end of the brush shape is in contact with the objective lens 2.
- a disc information area 31, a skip area 32, and a recording area 33 are formed, and the disc information area 31 is formed in the disc information area 31.
- the information (current value) on the magnetic head drive current when using the cleaning disk 23 is recorded in advance.
- the information on the magnetic head drive current is formed, for example, on the disk substrate 12 as minute irregularities.
- the magneto-optical disc device When recording on the magneto-optical disk 4 or the clearing disk 23 shown in FIGS. 1 to 5, the magneto-optical disk 4 or the cleaning disk 23 was rotated by the spindle motor 8. In this state, the optical head 1 irradiates the information layer 20 with a laser spot from one side to heat the recording portion of the information layer 20 to a temperature equal to or higher than the temperature of the cure. At the same time, the current modulated by the information signal is supplied from the magnetic head drive circuit 17 to the coil of the magnetic head main body 5 so that the magnetic core directs the information layer 20 toward the information layer 20. A strong magnetic field is generated and an N or S magnetic field is applied. As a result, a recording operation is performed.
- the slider portion of the magnetic head main body 5 is in sliding contact with the lubricating film 21 or the head cleaning member 22.
- the cleaning operation of the magnetic head 3 is, for example, a recording operation of about 10 seconds to 30 seconds for each MD. Then, as shown in Fig. 5, each time the cleaning operation is performed once, it is recorded as one song, and the next time the cleaning operation is performed, the next song is recorded. Is performed. In other words, the head cleaning member 22 does not contact and slide again at the part of the magnetic head body 5 where the slider part has slid. As a result, This prevents dust and the like adhering to the leaning layer from adhering to the magnetic head body 5 again.
- L1 indicates the recording area of the first music piece
- L2 and L3 indicate the recording areas of the second music piece and the third music piece, respectively.
- the optical head 1 reads the disk information area 31 first. .
- an appropriate modulation current to be supplied to the magnetic head 3 when the cleaning disc 23 is used is recorded in advance, and is read by the optical head 1.
- the set value information of the modulation current is sent from the signal to the magnetic head drive circuit 17 and the current supplied to the magnetic head 3 from the magnetic head drive circuit 17 is converted to the magneto-optical disk 4. Recording operation (usually about 100 mA to 150 mA for MD). That is, the modulation current is increased to an appropriate current value (typically, about 25 O mA to 400 mA in MD).
- the disk information area 31 of the cleaning disk 23 has the magnetic information.
- the cleaning disk can be obtained.
- the magnetic head drive current can be increased during the recording operation on 23, and the magnetic head drive current can be reduced during the recording operation on the magneto-optical disk 4 that is a normal medium. .
- the disk is the magneto-optical disk 4, and the structure of the magneto-optical disk device for disc identification is not complicated. Even if the specifications of the cleaning disk 23 are changed, the appropriate value of the drive current (modulation current) of the magnetic head to be recorded on the cleaning disk can be changed accordingly. If the operating conditions are set according to the appropriate value of the drive current (modulation current) of the magnetic head, the magneto-optical disk during cleaning can be used. The operating conditions of the device can always be set to an appropriate state according to the cleaning disk 23.
- FIG. 7 is an exploded perspective view of the cleaning disk and the magneto-optical disk device.
- the reliability of the device is improved. Is improved.
- the number of rotations of the magneto-optical disc at the time of cleaning can be read by the optical head 1.
- the operating condition of the magneto-optical disc device at the time of cleaning can be set to an appropriate state in accordance with the cleaning disc 30.
- the number of rotations of the magneto-optical disc at the time of cleaning can be read without providing a special structure, and the structure of the magneto-optical disc device is not complicated.
- the cleaning disk 30 or a normal magneto-optical disk can be used without any special configuration. 4 can be identified, and the structure of the magneto-optical disk device for disc identification does not become complicated.
- FIG. 8 is a sectional view of a principal part showing a cleaning state of a cleaning disk and a magneto-optical disk device according to the third embodiment of the present invention.
- FIG. 8 is different from the first and second embodiments in that the laser information of the optical head 1 when the cleaning disk is used is stored in the disk information area 44 of the cleaning disk 40. Information on power (output power value) is recorded in advance.
- the optical head 1 In the cleaning operation, when the cleaning disk 40 is mounted on the magneto-optical disk device, the optical head 1 first reads the disk information area 44. In this disc information area 44, setting information of the laser power emitted from the optical head 1 when the cleaning disk 40 is used is recorded in advance, and is read by the optical head 1. The transmitted signal is sent to the optical head drive circuit 47 as laser-power setting information. As a result, the laser power of the optical head 4 is controlled, and the laser power is made lower than in the recording operation on the magneto-optical disk 4 shown in FIG. At this time, it is particularly preferable to use the same laser power as that during the reproduction operation of the magneto-optical disk 4.
- the optical head 1 moves to the cleaning area 48 set on the outer peripheral side of the skip area 32, and the magnetic head 3 starts the recording state, that is, the cleaning operation. .
- the dust adhered to the magnetic head main body 5 is wiped off by the head cleaning member 22 and removed.
- the laser power of the optical head 1 at the time of cleaning, which is recorded on the cleaning disk 40 can be changed accordingly.
- the operating conditions are set in accordance with the cleaning conditions, the operating conditions of the magneto-optical disk device at the time of cleaning can be adjusted. Can always be set to an appropriate state.
- the recording current is applied to the magnetic head 3, but the energization to the magnetic head 3 may be cut off. In this case, in addition to the above effects, the power consumption of the magneto-optical disc device during the cleaning operation can be further reduced.
- the laser beam of the optical head 1 may be turned off during the cleaning operation. In this case, it is preferable to control the rotation speed by the FG signal of the spindle motor 8.
- FIG. 12 differs from the first, second, third and fourth embodiments in that the optical head 1 cleans the optical disk 1 when the disk is mounted (step S1).
- the information area 44 of the cleaning disk 40 is read (step S2), and based on the read information, it is determined whether or not the disk is a cleaning disk (step S3), and it is recognized that the disk is a cleaning disk. In this case, the disk initialization is prohibited (step S4), and if not, the disk initialization is enabled (step S5).
- the information area 44 of the cleaning disk 40 contains in advance the magneto-optical disk device control information such as the magnetic head drive current control information, the spindle motor rotation control information, and the laser power control information of the optical head 1. In addition, information on the number of times the cleaning disk has been used and the area in which the disk has been used is also written. The information is read by the optical head 1, and the magneto-optical disc device recognizes that the mounted disc is a cleaning disc.
- the magneto-optical disc device enters a mode in which the disc initialization for initializing the information area 44 is prohibited.
- the magneto-optical disc control information may be formed in a pit on the disc in advance.
- information about the usage status of the cleaning disk such as the number of times the cleaning disk has been used and the area in which it is used, must be written by a magneto-optical disk device. This prevents users from accidentally erasing cleaning disk usage information.
- the cleaning disk and the cleaning disk according to the fifth embodiment of the present invention are described.
- the information in the information area 44 is read by the optical head 1, and when the magneto-optical disk device determines the cleaning disk, the disk initialization is prohibited.
- the disk initialization is prohibited when the magneto-optical disk device recognizes the cleaning disk, but the disk initialization is performed when the entire cleaning area is used. In this case, the same cleaning disk can be used more than once in addition to the above effects.
- an area for recording the number of times of use of the disk be provided in the cleaning disk in addition to the information area 44, and that the information regarding the number of times of use be not erased at the disk initialization.
- the number of times the cleaning disk is used can always be determined. .
- the magneto-optical disk device reads the number of uses and determines that the number is more than a certain number, it is preferable to prohibit the use of the cleaning disk.
- FIG. 12 is an exploded perspective view of a recording / reproducing apparatus according to the sixth embodiment of the present invention.
- Figure 13 is a cross-sectional side view of the main parts of a magnetic head and a magneto-optical disk (normal recording / reproducing disk) during a normal recording operation.
- Figure 14 is a cross-sectional side view of the main part of the magnetic head cleaning disk and the magnetic head during the magnetic head cleaning operation.
- Figure 15 is an enlarged view of the main part of the sliding surface of the magnetic head.
- FIG. 16 is an explanatory diagram of a recording operation on a magnetic head cleaning disk.
- the optical head 1 includes an objective lens 2 for condensing and irradiating a laser beam to a magneto-optical disc 4 or a magnetic head cleaning disc 63.
- the magnetic head 3 slides in contact with the magneto-optical disk 4 to provide a modulated magnetic field, and a head body 5 is supported at one end of the suspension 13.
- the suspension 13 is made of a thin spring material such as SUS304 or BeCu, so that even when the magneto-optical disc 4 is run-out, the head body 5 is always connected to the magneto-optical disc 4.
- the magnetic head main body 5 includes a magnetic core 9, a coil 10, and a slider 11.
- the slider 11 is made of a resin having good slidability, for example, polyphenylene sulfide, liquid crystal polymer, etc. Slide into contact with magneto-optical disk 4 or magnetic head cleaning disk 63.
- the slider 11 is formed by integral molding with the suspension 13.
- the magnetic core 9 has an E-shape with its open end facing the sliding surface of the slider 11.
- the coil 10 is wound and fixed to the center pole of the magnetic core 9.
- the coil 10 is electrically connected to a suspension 13 having a power supply function, and a modulation current is supplied from a magnetic head drive circuit 17 to generate a modulation magnetic field. .
- the disk substrate 12 is formed of a resin such as polycarbonate.
- the recording / reproducing layer (information layer) 60 is made of a magnetic film capable of perpendicular magnetization, and is formed on the disk substrate 12 by a method such as sputtering.
- the lubricating film 61 is made of, for example, a silicone-based lubricant, and its thickness is generally 10 wm to 20 m in MD, for example.
- the symbol X indicates the direction of disk movement.
- the cleaning operation of the magnetic head 3 is, for example, a recording operation of about 10 seconds to 30 seconds for each MD. Then, as shown in Fig. 16, each time the clearing operation is performed once, it is recorded as one song, and the next time the cleaning operation is performed, the recording operation is performed as the next song. You. In other words, the system does not slide again on the portion of the cleaning layer 62 where the slider 11 has contacted and slid. This prevents dust or the like adhering to the cleaning layer from adhering to the slider 11 again.
- the symbol Y indicates the radial direction.
- the cleaning layer 62 easily scatters and absorbs relatively light, so that the reflection type sensor is used. 5 9 Received light intensity decreases.
- the reflection type sensor 59 determines that the disk medium is a magnetic head cleaning disk 63 based on a decrease in the amount of received light, and when the amount of received light is large, the disk medium is a normal magneto-optical disk. Disc 4 is determined.
- the magnetic head drive circuit 17 transfers the magnetic disk to the magnetic head 3.
- the modulation current to be supplied is larger than that in the normal recording operation on the magneto-optical disc 4.
- the reflection type sensor 59 is provided to discriminate the disk medium, and the magnetic head clear Jung disk 63 is provided.
- the current value supplied from the magnetic head drive circuit 17 to the magnetic head 3 can be made different between the recording operation of the magnetic head 4 and the recording operation of the normal magneto-optical disk 4.
- the modulation current is increased and the normal spacing is small.
- the modulation current can be reduced. This makes it possible to reduce the power consumption of the recording / reproducing apparatus and reduce electromagnetic noise.
- a CCD type sensor 64 is used instead of the reflection type sensor 59 as a discriminating means, and the color of the sliding surface in contact with the magnetic head of the disk medium is detected.
- the disc medium is determined to be a magnetic head cleaning disc 63 or a normal magneto-optical disc 4 depending on the disc medium.
- the difference between the recording / reproducing apparatus of the eighth embodiment and the recording / reproducing apparatus of the sixth and seventh embodiments is that the recording / reproducing apparatus of the eighth embodiment differs from the sixth and seventh embodiments in that a magnetic head of a disk medium is used as a discriminating means. Instead of detecting the reflectance or color of the sliding surface that contacts the disk medium, the magnetic disk detects the sliding load when the disk medium slides on the disk medium. The point is to determine whether the disc is a recording disc or a normal recording / playback disc.
- the drive current of the spindle motor 8 for rotating the disk medium is changed when the magnetic head comes into contact with the disk medium and slides.
- the cleaning layer 62 of the magnetic head cleaning disk 63 has a higher coefficient of friction than the lubricating film 61 of the magneto-optical disk 4, so that the magnetic head cleaning disk 63 has a larger coefficient of friction.
- 3 is mounted on the recording / reproducing device, and when the magnetic head 3 starts to slide into contact with the cleaning layer 62, the rotational load on the spindle motor 8 increases, and the driving current increases. Therefore, as shown in FIG. 18, the type of the disc medium is determined by detecting the drive current of the spindle motor 8 by the motor drive current detection circuit 65, and the magnetic core 9 and the recording / reproducing layer 60 are detected. Only in the case of the magnetic head cleaning disk 63 where the spacing with the magnetic head is large, the modulation current supplied from the magnetic head drive circuit 17 to the magnetic head 3 is increased.
- a motor drive current detection circuit 65 is provided to detect the drive current of the spindle motor 8 as a sliding load, thereby eliminating the need for a special sensor.
- the magnetic head disc 63 and the normal recording / reproducing disc 4 can be distinguished, and the cost of the recording / reproducing apparatus can be reduced by reducing the number of parts.
- FIG. 19 is an exploded perspective view showing a recording / reproducing apparatus according to the ninth embodiment of the present invention.
- the difference between the recording / reproducing apparatus of the ninth embodiment and that of the eighth embodiment is that the disc information determined by the motor drive current detection circuit 67 is read by the magnetic head drive circuit 6. In addition to the above, it is also transmitted to the motor drive circuit 68.
- the motor drive current detection circuit 67 detects the drive current of the spindle motor 8, similarly to the motor drive current detection circuit 65.
- the motor drive circuit 68 supplies a drive current to the spindle motor 8, and has a function of controlling the rotation speed of the spindle motor 8 according to the determination result of the motor drive current detection circuit 67. Specifically, when the disk medium is a magnetic head cleaning disk 63, the rotation speed is set lower than in the case of a normal magneto-optical disk 4.
- the cleaning layer 62 of the magnetic head cleaning disk 63 has a larger coefficient of friction than the lubricating film 61 of the magneto-optical disk 4, so that the magnetic head cleaning disk 63 has a larger friction coefficient.
- the rotational load on the spindle motor 8 increases. Therefore, the drive current becomes large. Therefore, the type of the disk medium is determined by the motor drive current detection circuit 67. The discrimination is made, and in the case of the magnetic head cleaning disk 63, the spindle motor 8 is controlled to a low speed rotation by the motor drive circuit 68. As a result, the wear of the slider 11 caused by sliding on the cleaning layer 62 having a large friction coefficient can be reduced.
- the type of the disc medium is determined by the motor drive current detection circuit 67.
- the wear of the slider 11 can be reduced by rotating the spindle motor 8 at low speed, and the reliability of the recording / reproducing apparatus can be improved.
- the motor drive circuit is controlled by the discrimination output of the reflection sensor 59 in the sixth embodiment or the CCD sensor 64 in the seventh embodiment in the same manner as in the ninth embodiment, and the In the case of the disk cleaning disk 63, the spindle motor 8 may be rotated at a low speed. In this case, as in the ninth embodiment, the wear of the slider 11 caused by sliding the cleaning layer 62 having a large friction coefficient can be reduced, and the reliability of the recording / reproducing apparatus can be reduced. Can be improved.
- the recording / reproducing apparatus of the magnetic recording / reproducing method represented by FDD has a configuration which can be implemented by removing the optical head 1 from the above-described sixth to ninth embodiments. Yes, the description here is omitted.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00976381A EP1150278A4 (en) | 1999-11-25 | 2000-11-20 | Cleaning disc, magneto-optical disc apparatus and recording/reproducing apparatus |
US09/889,017 US6711102B1 (en) | 1999-11-25 | 2000-11-20 | Magneto-optical cleaning disk |
AU14182/01A AU1418201A (en) | 1999-11-25 | 2000-11-20 | Cleaning disc, magneto-optical disc apparatus and recording/reproducing apparatus |
US10/637,567 US6973011B2 (en) | 1999-11-25 | 2003-08-11 | Magnetic head cleaning disk for use in magneto-optical recording and reproducing device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/334377 | 1999-11-25 | ||
JP33437799 | 1999-11-25 | ||
JP2000-190894 | 2000-06-26 | ||
JP2000190894 | 2000-06-26 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09889017 A-371-Of-International | 2000-11-20 | ||
US10/637,567 Division US6973011B2 (en) | 1999-11-25 | 2003-08-11 | Magnetic head cleaning disk for use in magneto-optical recording and reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001039182A1 true WO2001039182A1 (en) | 2001-05-31 |
Family
ID=26574826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/008190 WO2001039182A1 (en) | 1999-11-25 | 2000-11-20 | Cleaning disc, magneto-optical disc apparatus and recording/reproducing apparatus |
Country Status (4)
Country | Link |
---|---|
US (2) | US6711102B1 (en) |
EP (1) | EP1150278A4 (en) |
AU (1) | AU1418201A (en) |
WO (1) | WO2001039182A1 (en) |
Families Citing this family (9)
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JP3088608U (en) * | 2002-03-14 | 2002-09-20 | オリエント測器コンピュータ株式会社 | Hard disk drive recording data erasing device |
KR20080077684A (en) * | 2005-12-16 | 2008-08-25 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | A method of cleaning an optical face of a refractive element for a near field optical scanning apparatus and a cleaning device for cleaning an optical face of a refractive element for a near field optical scanning apparatus |
RU2334280C1 (en) * | 2007-04-02 | 2008-09-20 | Дмитрий Анатольевич Беляев | Device for cleaning spindle lodgement of device for reading and-or data recording on compact discs |
US7544252B1 (en) | 2008-08-20 | 2009-06-09 | International Business Machines Corporation | Spring actuated slotted DIMM contact cleaning device |
US8897112B2 (en) * | 2011-07-15 | 2014-11-25 | Panasonic Corporation | Information recording/reproduction device, cleaning tape, and optical pickup cleaning method |
JP5849212B2 (en) * | 2011-12-02 | 2016-01-27 | パナソニックIpマネジメント株式会社 | Lens cleaner and optical disk apparatus |
US10121581B2 (en) * | 2014-09-29 | 2018-11-06 | Apple Inc. | Method for magnetizing multiple zones in a monolithic piece of magnetic material |
US9858953B1 (en) * | 2017-03-31 | 2018-01-02 | Seagate Technology Llc | Method of removing head contamination during contact detection |
US10199067B1 (en) * | 2018-03-23 | 2019-02-05 | Seagate Technology Llc | Adaptive cleaning of a media surface responsive to a mechanical disturbance event |
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Also Published As
Publication number | Publication date |
---|---|
EP1150278A4 (en) | 2006-11-22 |
AU1418201A (en) | 2001-06-04 |
US6973011B2 (en) | 2005-12-06 |
US6711102B1 (en) | 2004-03-23 |
US20040027927A1 (en) | 2004-02-12 |
EP1150278A1 (en) | 2001-10-31 |
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